Income Taxes - Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Federal:
Current	$ 64	$ (113)	$ 2,200
Deferred	2,654	52,367	15,310
Total Federal	2,718	52,254	17,510
State:
Current	(449)	(2,798)	(995)
Deferred (included in Federal above)	0	0	0
Total State	(449)	(2,798)	(995)
Total	$ 2,269	$ 49,456	$ 16,515